From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 409672746B for ; Wed, 20 Mar 2024 15:32:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710948771; cv=none; b=g4yDX6dqSvchY1lmRfOWDiQY/b7QqiAS6HRwlSjs1o8n2eQMSnQJ8kWtX2AtNHVtpMe2POViQNJGjzrFrHz/37W3lFx0F34ZQySfkTnYcS4shvlFutD3lNnlDmeEw28RsMbmH4pd50A+VyYIai/1dMTwQp6uckMIZEf2g4Ddw2g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1710948771; c=relaxed/simple; bh=TaikWDcEy/eefAipbr1kYwtCPCWVVRe3j3L/5KQxH1U=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=U6+ERvCVvP3CTaNQ/K5yha+NuK3WeuSi4erWNnfR86tjJmBEH8HD9k3p+bGIpOYFSfOX2pR+c34mrxmrwgUgigm4jlZ3oG2RnpPUZ9idRgrnp0S9f9RAA2vniv/f1/Nw8UN1fKial/nOEId5zkxCx8XLJtsXWYDtdpfjXjgURmo= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=rJgTYUAM; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="rJgTYUAM" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 10D7AC433F1; Wed, 20 Mar 2024 15:32:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1710948770; bh=TaikWDcEy/eefAipbr1kYwtCPCWVVRe3j3L/5KQxH1U=; h=Date:Subject:To:References:From:In-Reply-To:From; b=rJgTYUAMR7xYxJsPKBou+wq/ZRPnjUILoEIQiUEj23b+KwRKKbWdbww5tNcZ6S0Il E2hNlh6t3miLoTtYJ7MXRb+dh6I3BlG3j3AYE2Ei48O80n8ZQz8LUwu1/GMGhAGnvO FnPQ4V/jsDDWNM6vO0Yy/0cPuX7v7nogavI5EWmRmydDMeGZfn4Zny736w1NF5HWSx FwueHuw80fNP7R6BSbX/29l+0kXRMirpDtQuIFEaaXv3JJkJKWAI++dIeOHOsZkb5o xmAdVHq5dgU6DxI4By7zdLy7pV06FbEDRtKn1a0UjxEH49mqYvoX/hMWQIhBuDf1SP gbNMEge9pB8SQ== Message-ID: Date: Wed, 20 Mar 2024 23:32:46 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [f2fs-dev] [PATCH] f2fs: avoid the deadlock case when stopping discard thread To: Jaegeuk Kim , linux-kernel@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net References: <20240320001442.497813-1-jaegeuk@kernel.org> Content-Language: en-US From: Chao Yu Autocrypt: addr=chao@kernel.org; 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charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 2024/3/20 8:14, Jaegeuk Kim wrote: > f2fs_ioc_shutdown(F2FS_GOING_DOWN_NOSYNC) issue_discard_thread > - mnt_want_write_file() > - sb_start_write(SB_FREEZE_WRITE) > - sb_start_intwrite(SB_FREEZE_FS); > - f2fs_stop_checkpoint(sbi, false, : waiting > STOP_CP_REASON_SHUTDOWN); > - f2fs_stop_discard_thread(sbi); > - kthread_stop() > : waiting > > - mnt_drop_write_file(filp); > > Signed-off-by: Jaegeuk Kim Reviewed-by: Chao Yu Thanks,